Sealing tool



March 21, 1933. RT. EDWARDS SEALING TOOL Filed July 19, 1930 2 Sheets-Sheet l fizz/62% .El 6'56 32 Z'Zdzuarcli R. T. EDWARDS March 21, 19 33- 2 Shets-Sheet 2 ja /6752 07 GjZZZEdZIJaI dJ.

SEALING TOOL fiaau" Filed July 19, .1930

Patented Mar. 21, 1933 UNITED STATES PATENT OFFICE RUSSELL '1. EDWARDS, OF CHICAGO, ILLINOIS, ASSIGNOR TO SIGNODE STEEL STRAP- PING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE SEALING r001.

Application filed July 19, 1930. Serial N0. 469,125.

This invention relates to sealing tools and more particularly to tools adapted to join mutually overlapping metal strap ends by making interlocking deformations therein to prevent relative movement of the straps. An object of this invention is the provision of a sealing tool of a simplified construction which is capable of exerting great force on straps to be interlocked, and adapted to form seals which includes certain additional deformations of such size and in such positions as to be a great improvement over seals heretofore made. A tool of this general character is illustrated in United States Patent No.

1,038,109 granted September 10, 1912.

In the use of a sealing tool of this kind the band or metal strap is first tightenedabout a package, and after applying a suitable sleeve of the general type illustrated m United States Patent No. 1,445,330 granted February 23, 1913, the sleeves and straps, or overlapping ends of a strap, are simultaneously subjected to an edgewise deforming or crimping operation of the sealing tool whereby the overlapped strap ends are held against relative longitudinal movement when tensional strain is exerted thereon. It has been found that seals of the simpler character often become bro-ken owing to insuflicient interlocking of the parts on account of weakening of the parts by deformatlons which cause excessively high stresses in some portions of the strap while leaving other portions practically free from stress until the more highly stressed portions have become fractured. Another object of this invention is to overcome such difliculties by the provision of an improved sealing tool which is adapted to produce such deformations in the sealing sleeve and in the overlapped strap ends, that the seal will receive a substantially uniformly distributed stress throughout its width when subjected to additional strain.

Another object of my invention is the provision of a sealing tool which comprises an improved anvil or pressure block of such shape and size that it not only supports the 50 seal but makes certain additional deformations therein which aid in the formation of a seal having equally distributed stresses when tensioned.

A still further object of the inventionis the provision of a tool whichis economical to manufacture, having a minimum number of parts for producing the necessary mechanical advantage, which parts are assembled and secured together in a manner to minimize the required labor and to simplify the disassembly and repair of the tool.

In the accompanying drawings,

Figure 1 is an elevational view of a sealing tool incorporating my invention;

Figure 2 is a fragmentary view similar to Figure 1 but showing the jaws in open position' and one of the side plates removed with the bolts in section and the hinge pin in section;

Figure 3 is a section taken on substantially the line 33 of Figure 1;

Figure 4 is a section taken on substantially the line 4-4 of Figure 1;

Figure 5 is a perspective view of one form of my improved pressure block or anvil;

Figure 6 is a perspective view of a modified form of pressure block; and

Figure 7 is a perspective view of the improved type of seal formed by a tool embodying my invention.

My improved sealing tool comprises confronting jaws 10 which have upwardly extending lips 11 which approach each other as in Figure 1 when closed. The jaws 1Ov are pivoted to side plates 12 by bolts 13 which have nuts 14: thereon for securing the plates 12 from relative movement. The jaws 10 are provided with extensions or arms 15 which diverge, as shown in Figures 1 and 2, and which are pivotally connected to actuating elements or blocks 16 by pivot pins 17. The actuating elements 16 are connected together by a hinge pin 18, the ends of which extend beyond the actuating elements and into the guide grooves19 in the inner sides of the plates 12. The shoulders 21 surrounding the guide grooves 19 restrain the hinge pin 18 to movement along a predetermined pathas willbe apparent. The plates 12 are of such a width that, regardless of the position in' which the arms 15 are moved during the 100 operation of the tool, thepivot pins 17 are confined to their position by engagement with the plates 12, as shown in Figures 1 and 3.

The actuating elements 16 are identical in form and when positioned as in the assembled tool, certain parts thereof intermesh such that the hinge pin 18 may pass through the same for securing them together. The actuating elements are provided with confronting shoulders 25 and 26 which engage each other 'to limit the closing movement of the jaws.

They are also provided with confronting shoulders 27 and 28 which are adapted to engage each other to limit the opening movement of the jaws. Extensions 29 on the actuating elements fit into the tubular handles 31 which are of sufiicient length to give adequate mechanical advantage for operationof the jaws. The handles 31 are provided with hand grips 32 of suitable material. An anvil or pressure block 35 is'disposed between the jaws 10 and is rigidly fixed relative to the plates 12 by means of the bolts 13 which pass through the openings 36 adjacent the ends thereof.

For the purpose of forming crosswise deformations 37 in the seal 38 as shown in Figure 7, the pressure block is provided with parallel ribs 39. These crosswise deformations very greatly aid in distributing the stress across the width of the metal strap or band ends 40 and 41. In the modification shown in Figure 6, an additional rib 42 is provided which extends from one of the ribs 39 to the other, and preferably at right angles thereto for causing a deformation 45 in the seal as shown in Figure 7. It has been found that when the lighter gauge metal bands are used, the deformation 45 is automatically produced without the aid of the rib 42, but when heavier materials are used it has been found necessary to employ the rib 42 for producing a seal having the deformation 45. Y

The jaws 10 are provided with removable deforming pins 47 which, upon closingthe jaws on the straps to be sealed together, produce marginal deformations 48 in the sleeve 49 and in the band ends 40 and 41.

It will be readily understood by those skilled in the art that my invention, as herein described, is of a greatly simplified form having relatively few pivot points and only two bolts 13 for securing the parts in assembled position without sacrificin mechanical advantage afforded action. The pivot pins 17 and the'hinge pin 18 are not riveted over at their ends but may be of true cylindrical form having only a snug fit in theparts which they secure together as they'are held from axialmovement by engagement with the inner surface of theplates 12. The hinge pin 18 is additionally restrained from novement relative to the plate 12 except along a predetermined path which is along the longitudinal axis of the tool the great y a toggle.

1. In a-tool of the class described, in combination, cooperating work engaging jaws, plates on the sides of said tool having opposed guide grooves therein, bolts pivotally securing said jaws to said plates, actuating elements for said jaws, arms on said jaws, pivot pins securing said arms to said actuating elements, a hinge pin securing said actuat ing elements to each other and extending into the guide grooves in said plates, said pivot pins being at all times confined in place by engagement at their ends with said plates, a pressure block disposed between said jaws and rigidly fixed to said plates, and two parallel work engaging ribs on said pressure block extending entirely across the face thereof, and a third rib, together with the parallel ribs, constituting an H-shaped formation.

2. In a tool of the class described, in combination, cooperating work engaging jaws, plates on the sides of said tool having opposed guide grooves therein, bolts pivotally securing said jaws to said plates, actuating elements for said jaws, arms on said jaws, pivot pins securing said arms to said actuating elements, a hinge pin securing said actuating elements to each other and extending into the guide grooves in said plates, and being confined thereby in its movement to a predetermined path and being positively restrained from axial movement, said pivot pins being confined from axial movement by engagement with said plates, a pressure block disposed between said jaws and rigidly fixed relative to said plates, and two parallel work engaging ribs on said pressure block extending entirely across the face thereof, and a.

third rib extending between said parallel ribs and at right angles thereto.

tem therefor including operating handles having mutually intermeshing hinge extensions, a common pivot pin interconnecting said hinge extensions, movement limiting shoulders 0n the hinge extensions to limit the movement of the operating handles in both directions, a deforming anvil having an H- shaped die in its face and forming a linka e member in said lever system between sald Jaws.

3. A sealing tool comprising confronting' 4. The combination with a sealing tool having deforming jaws and an actuating lever system therefor, of a crimping anvil having an H-shaped crimping die on its face and forming a part of said lever system.

5. In a sealing tool, the combination of deforming jaws having inwardly extending deforming pins, alever system to actuate said jaws, a linking member for said lever system, and a deforming die formed in said linking member, said die being substantially H-shaped in form and having the parallel sides of the H extended in the line of movement of said jaws, said deforming pins being adapted to move in the open ends of said 6. In a tool of the class described, the combination of deforming aws with adeforming anvil cooperable with said jaws, to form in a sealing band a substantially H-shaped crimp, said anvil comprising a metallic block having an H-shaped raised portion and being interposed between said jaws, the parallel sides of said raised portion being parallel to the direction of movement of said aws.

In witness whereof, I hereunto subscribe my name this 7th day of July, 1930.

RUSSELL T. EDWARDS, 

